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Article
Publication date: 1 February 1991

Mohammad I. Ansari

I. Introduction The emphasis on the concept of ‘economic man’ for a long period of time has led to important outcomes each of which has serious welfare implications…

Abstract

I. Introduction The emphasis on the concept of ‘economic man’ for a long period of time has led to important outcomes each of which has serious welfare implications. First, there has been a relentless glorification of the principle of pursuit of self‐interest. It is only now that all the negative spillover effects of our wealth creating and consuming activities are being acknowledged and evaluated. Since most of these costs are costs to society rather than to a particular individual, these costs do not play any role in our production or consumption decisions. As a result, quality of life has not improved as much as the recent rise in per capita real income suggests. Second, for a long time welfare has been treated as a monotonically increasing function of the amounts of goods and services consumed. There has been a total disregard for the fact that at a given point in time an individual can afford only a fraction of the total amount of goods and services available in the society. This explains at least in part why even in the most affluent societies people are no happier today than they were in the past. And third, although the idea of interdependent welfare is not new in economics as evidenced by relative income hypothesis which shows that present consumption and hence welfare is also a function of one's past consumption and consumption of others in the society, economic analysis by and large has been carried out on the assumption of independence. Feelings like envy, jealousy, and avarice are real and powerful and play an important role in the way people perceive their welfare. Just because they cannot be conveniently incorporated in simple analytical model is a poor excuse for neglecting them.

Details

Humanomics, vol. 7 no. 2
Type: Research Article
ISSN: 0828-8666

Article
Publication date: 19 August 2019

Amir Norouzzadeh, Mohammad Faraji Oskouie, Reza Ansari and Hessam Rouhi

This paper aims to combine Eringen’s micromorphic and nonlocal theories and thus develop a comprehensive size-dependent beam model capable of capturing the effects of…

Abstract

Purpose

This paper aims to combine Eringen’s micromorphic and nonlocal theories and thus develop a comprehensive size-dependent beam model capable of capturing the effects of micro-rotational/stretch/shear degrees of freedom of material particles and nonlocality simultaneously.

Design/methodology/approach

To consider nonlocal influences, both integral (original) and differential versions of Eringen’s nonlocal theory are used. Accordingly, integral nonlocal-micromorphic and differential nonlocal-micromorphic beam models are formulated using matrix-vector relations, which are suitable for implementing in numerical approaches. A finite element (FE) formulation is also provided to solve the obtained equilibrium equations in the variational form. Timoshenko micro-/nano-beams with different boundary conditions are selected as the problem under study whose static bending is addressed.

Findings

It was shown that the paradox related to the clamped-free beam is resolved by the present integral nonlocal-micromorphic model. It was also indicated that the nonlocal effect captured by the integral model is more pronounced than that by its differential counterpart. Moreover, it was revealed that by the present approach, the softening and hardening effects, respectively, originated from the nonlocal and micromorphic theories can be considered simultaneously.

Originality/value

Developing a hybrid size-dependent Timoshenko beam model including micromorphic and nonlocal effects. Considering the nonlocal effect based on both Eringen’s integral and differential models proposing an FE approach to solve the bending problem, and resolving the paradox related to nanocantilever.

Details

Engineering Computations, vol. 37 no. 2
Type: Research Article
ISSN: 0264-4401

Keywords

Article
Publication date: 6 March 2017

Mohammad Fahim Ansari and Gautam Sarkhel

The purpose of this study is to improve the coating properties of shellac–epoxidised novolac blends by treatment with melamine formaldehyde resin (MF) at ambient…

Abstract

Purpose

The purpose of this study is to improve the coating properties of shellac–epoxidised novolac blends by treatment with melamine formaldehyde resin (MF) at ambient temperature for its use as a coating material.

Design/methodology/approach

Epoxidised-novolac resin was synthesised by epoxidation of novolac resin with epichlorohydrin. Novolac resin was synthesised by reaction of phenol with formaldehyde in acidic medium. Shellac was blended with the epoxidised-novolac resin in solution in varying ratios and treated the blends with MF resin in fixed ratio. Coating properties of the treated compositions were studied using a standard procedure. The compositions were characterised with Fourier transform infrared spectroscopy (FT-IR), thermogravimetric analysis (TGA) and scanning electron microscopic (SEM) spectroscopy.

Findings

Treatment of shellac–epoxidised-novolac blends with MF resin improved water and alkali resistance of the blends, besides enhancing gloss. Gloss in all the blends was uniformly increased on treatment with MF resin. Water resistance of the blends tremendously improved after treatment with MF resin. Contact angle of the blends against water increased while decreased against ethylene glycol and dioxane. The compositions were more resistant to polar solvent than non-polar ones, suggesting that the compositions shifted to hydrophobic (lipophilic) nature on treatment with the MF resin.

Research limitations/implications

A specified concentration of MF resin was used in the study. Different concentrations of the MF resin can also be tried for treatment of shellac–epoxidised-novolac blends to see the effect of the resin on the blends.

Practical implications

Treatment of shellac–epoxidised-novolac blend with MF resin improved the coating properties of the blends. The formulation SeNB-64 is the best with high gloss, good impact, scratch hardness and water resistance, and hence can be used as coating material for metal surfaces.

Originality/value

Blending of shellac with epoxidised-novolac resin and treatment of the blends with the MF resin was done for the first time. The formulation SeNB-64 can be used as coating material for metal surfaces.

Details

Pigment & Resin Technology, vol. 46 no. 2
Type: Research Article
ISSN: 0369-9420

Keywords

Article
Publication date: 27 June 2020

Abbas Doulani, Nasim Ansari, Seyedeh Zahra Mirezati and Mohammad Karim Saberi

The aim of this study is to identify the status of managing gray literature (GL) in medical science libraries in terms of three dimensions, collection development…

Abstract

Purpose

The aim of this study is to identify the status of managing gray literature (GL) in medical science libraries in terms of three dimensions, collection development, organization and dissemination.

Design/methodology/approach

In this survey study, a structured questionnaire was used. The questionnaire consisted of 30 questions and consisted of six sections (demographic characteristics, the use of the term GL, types of GL, collection development, organization and dissemination). In total, 50 librarians from 15 medical science libraries participated in this study. The questionnaires were distributed manually to librarians by visiting libraries. All the librarians filled in the questionnaires. It should be noted that descriptive statistics and Excel and SPSS software were used for data analysis.

Findings

The results of using the term GL showed that 68 per cent of librarians use the source name itself. Most GL in libraries were theses (94 per cent). Moreover, a review of the status of GL collection showed that 60 per cent of libraries had written instructions for providing these resources. A total of 62 per cent of librarians stated that there is a GL selection committee in their library and the librarian is the most important member of the collection department. A total of 40 per cent of libraries were weeding GL. The most common way of obtaining GL was through deposition. The analysis of the status of GL organization indicated that 80 per cent of libraries had GL organization. A total of 90 per cent of libraries had digitized GL, and that librarians played a large role in organizing such resources. Evaluation of the dissemination of GL showed that all libraries have enabled users to access GL. In most libraries, users were only allowed to use GL in the library, and it was not possible to copy GL. Students and faculty members were the most important users of GL. Informing through the library website and the parent organization was the most important way of informing about these resources.

Originality/value

GL is one of the most important resources in medical and non-medical academic libraries. In this study, for the first time, the status of GL management in Iranian libraries of medical sciences was investigated. The results of this study can be useful for policymakers and managers of medical and non-medical libraries.

Details

Collection and Curation, vol. 40 no. 3
Type: Research Article
ISSN: 2514-9326

Keywords

Article
Publication date: 8 August 2022

Mohammad Shahid, Zubair Ashraf, Mohd Shamim and Mohd Shamim Ansari

Optimum utilization of investments has always been considered one of the most crucial aspects of capital markets. Investment into various securities is the subject of…

Abstract

Purpose

Optimum utilization of investments has always been considered one of the most crucial aspects of capital markets. Investment into various securities is the subject of portfolio optimization intent to maximize return at minimum risk. In this series, a population-based evolutionary approach, stochastic fractal search (SFS), is derived from the natural growth phenomenon. This study aims to develop portfolio selection model using SFS approach to construct an efficient portfolio by optimizing the Sharpe ratio with risk budgeting constraints.

Design/methodology/approach

This paper proposes a constrained portfolio optimization model using the SFS approach with risk-budgeting constraints. SFS is an evolutionary method inspired by the natural growth process which has been modeled using the fractal theory. Experimental analysis has been conducted to determine the effectiveness of the proposed model by making comparisons with state-of-the-art from domain such as genetic algorithm, particle swarm optimization, simulated annealing and differential evolution. The real datasets of the Indian stock exchanges and datasets of global stock exchanges such as Nikkei 225, DAX 100, FTSE 100, Hang Seng31 and S&P 100 have been taken in the study.

Findings

The study confirms the better performance of the SFS model among its peers. Also, statistical analysis has been done using SPSS 20 to confirm the hypothesis developed in the experimental analysis.

Originality/value

In the recent past, researchers have already proposed a significant number of models to solve portfolio selection problems using the meta-heuristic approach. However, this is the first attempt to apply the SFS optimization approach to the problem.

Details

International Journal of Intelligent Computing and Cybernetics, vol. ahead-of-print no. ahead-of-print
Type: Research Article
ISSN: 1756-378X

Keywords

Article
Publication date: 18 January 2022

Noora Lari, Mohammad Al-Ansari and Engi El-Maghraby

In patriarchal settings, cultural barriers continue to influence women’s participation in positions of leadership and political authority. This paper aims to explore these…

Abstract

Purpose

In patriarchal settings, cultural barriers continue to influence women’s participation in positions of leadership and political authority. This paper aims to explore these findings in light of the theoretical concepts of “hegemonic masculinity” and “patriarchy,” which explain gender disparities in the occupancy of political power and leadership positions in Qatar.

Design/methodology/approach

Data from original face-to-face national surveys conducted among subjects in Qatar were used, including 1,611 completed household interviews.

Findings

The findings were consistent with the prevailing patriarchal beliefs present in Qatari society and Arab Gulf States. The analysis showed that there was greater significant support for men holding key leadership and authority positions than women. Individual-level factors were found to have a significant association with attitudes favoring women. Compared to respondents who had never attended school, those who had completed secondary school and those who had partaken in higher education favored having women in leadership roles.

Practical implications

As a means to fix the gender imbalance within the occupancy of positions of political power in Qatar, this study recommends putting substantial efforts into increasing the number of interventions underpinning gender equality through social awareness programs that may improve the public’s perceptions. Furthermore, gender-equitable affirmative actions are needed to promote the inclusion of women in power and increase their presence in leadership roles.

Originality/value

This study is among the very few that have theoretically and empirically addressed the issue of women’s authority and involvement in key leadership roles in the context of Qatar.

Details

Gender in Management: An International Journal , vol. 37 no. 4
Type: Research Article
ISSN: 1754-2413

Keywords

Article
Publication date: 15 June 2021

Bakhtiar Piroozi, Farman Zahir Abdullah, Amjad Mohamadi-Bolbanabad, Hossein Safari, Mohammad Amerzadeh, Satar Rezaei, Ghobad Moradi, Masoumeh Ansari, Abdorrahim Afkhamzadeh and Jamshid Gholami

The purpose of this study is to investigate the status of perceived need, seeking behavior and utilization of health services in the elderly population of Sanandaj (west of Iran).

Abstract

Purpose

The purpose of this study is to investigate the status of perceived need, seeking behavior and utilization of health services in the elderly population of Sanandaj (west of Iran).

Design/methodology/approach

This is a cross-sectional study conducted on 800 elderly people in Sanandaj. Subjects were selected using multistage sampling and data were collected using self-report questionnaires. A multivariate logistic model with odds ratios (ORs) was used to determine the relationship of independent variables with seeking perceived need. Also, the concentration index was used to measure the inequality in using health services.

Findings

The perceived need for outpatient (during the last 30 days) and inpatient health-care services (during the past 12 months) was 69.7% and 29.7%, respectively. Among them, the unmet need for outpatient and inpatient health-care services was 46.6% and 17%, respectively. Having health insurance (adjusted OR 12.08; 95% confidence interval [CI] 1.04–140.11), middle economic status (adjusted OR 5.18; 95% CI 1.30–20.51) and being in an age group of 65–70 years (adjusted OR 7.60; CI 1.42–40.61) increased the chance of seeking inpatient care. Also, being in an age group of 60–65 years (adjusted OR 0.41; 95% CI 0.18–0.95) reduced the chance of seeking outpatient care. There was also a pro-rich inequality in using outpatient health services.

Originality/value

The elderly population suffers from unmet health-care needs, especially in outpatient services. The most important reason for not seeking outpatient and inpatient services was financial barriers and self-medication, respectively. So, designing targeted policies and interventions to address barriers in the conversion of need to demand in the elderly population is essential.

Details

International Journal of Human Rights in Healthcare, vol. 14 no. 5
Type: Research Article
ISSN: 2056-4902

Keywords

Article
Publication date: 19 December 2017

Mohammad Malikan

The purpose of this paper is to predict the mechanical behavior of a piezoelectric nanoplate under shear stability by taking electric voltage into account in thermal environment.

Abstract

Purpose

The purpose of this paper is to predict the mechanical behavior of a piezoelectric nanoplate under shear stability by taking electric voltage into account in thermal environment.

Design/methodology/approach

Simplified first-order shear deformation theory has been used as a displacement field. Modified couple stress theory has been applied for considering small-size effects. An analytical solution has been taken into account for various boundary conditions.

Findings

The length scale impact on the results of any boundary conditions increases with an increase in l parameter. The effect of external electric voltage on the critical shear load is more than room temperature effects. With increasing aspect ratio the critical shear load decreases and external electric voltage becomes more impressive. By considering piezoelectric nanoplates, it is proved that the temperature rise cannot become a sensitive factor on the buckling behavior. The length scale parameter has more effect for more flexible boundary conditions than others. By considering nanosize, the consideration has led to much bigger critical load vs macro plate.

Originality/value

In the current paper for the first time the simplified first-order shear deformation theory is used for obtaining governing equations by using nonlinear strains for shear buckling of a piezoelectric nanoplate. The couple stress theory for the first time is applied on the nonlinear first-order shear deformation theory. For the first time, the thermal environment effects are considered on shear stability of a piezoelectric nanoplate.

Details

Multidiscipline Modeling in Materials and Structures, vol. 14 no. 1
Type: Research Article
ISSN: 1573-6105

Keywords

Article
Publication date: 8 April 2021

Mohammad Sadegh Eshaghi, Bahram Ranjbarian and Azarnoush Ansari

This study, by applying psychological life-space theory, aims to identify the role of banking activities in customers’ well-being.

Abstract

Purpose

This study, by applying psychological life-space theory, aims to identify the role of banking activities in customers’ well-being.

Design/methodology/approach

Following a quantitative approach, a two-stage method of structural equation modelling was used to test the hypotheses. Through a close-ended questionnaire, data were obtained from banks’ customers. A partial least squares regression was used to test both inner and outer models. Sample power software was used to calculate the minimum sample size of the study.

Findings

A new variable namely customer well-being stems from banking activities identified which is assumed to be influenced by bank’s image, perceived value and aroused emotions. It was tested that word of mouth and bank’s marketing activities have impacts on the bank’s image. Moreover, by differentiating the images of different entities, it was proposed that comparative images could be considered as moderating variable. Furthermore, the mediating role of perceived value and aroused emotions are documented.

Originality/value

Applying psychological life-space theory, a new concept that is not limited to the financial aspect of well-being presented and tested. Although researchers in different filed of studies applied this theory, this is the first time that a study presents nominal and operational definitions of the role of banks in customers’ well-being. Moreover, for the first time in the bank marketing literature, images of different entities including consumer’s image, image of bank’s employee and image of bank’s competitors were separated and their causal relations were statistically tested.

Details

Journal of Islamic Marketing, vol. 13 no. 8
Type: Research Article
ISSN: 1759-0833

Keywords

Article
Publication date: 25 June 2019

Mohammad Hashemian, Amir Homayoun Vaez and Davood Toghraie

The dynamic stability of nano-tubes is an important issue in engineering applications. Dynamic stability of anti-symmetric coupled-carbon nanotubes (C-CNTs)-systems in…

Abstract

Purpose

The dynamic stability of nano-tubes is an important issue in engineering applications. Dynamic stability of anti-symmetric coupled-carbon nanotubes (C-CNTs)-systems in thermal environment is presented in this paper. In this system, the top and bottom CNTs are subjected to axial harmonic load and action of the viscous fluid, respectively.

Design/methodology/approach

The coupling and surrounding mediums of the CNTs are simulated by visco-Pasternak foundation containing the spring, shear and damper coefficients. Based on the Timoshenko beam theory and Hamilton’s principle, the coupled motion equations are derived considering size effects using Eringen’s nonlocal theory. Using the exact solution in conjunction with Bolotin’s method, the dynamic instability region (DIR) of the coupled structure is obtained. The effects of various parameters such as small scale parameter, Knudsen number, fluid velocity, static load factor, temperature change, surrounding medium and nanotubes aspect ratio are shown on the DIR of the coupled system.

Findings

Results indicate that considering parameters such as small scale effects, static load factor, Knudsen number and fluid velocity shifts the DIR of C-CNTs to a lower frequency zone.

Originality/value

To the best of our knowledge, analyses of anti-symmetric coupled CNTs have not received enough attentions so far. In order to optimize the nanostructures designing, the main purpose of the present paper is to investigate nonlocal dynamic stability of CNTs subjected to axial harmonic load coupled with CNTs conveying fluid.

Details

International Journal of Numerical Methods for Heat & Fluid Flow, vol. 30 no. 6
Type: Research Article
ISSN: 0961-5539

Keywords

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